いっ
一
ぱい
杯

noun, takes genitive case の

  1. one cup (of), one glass (of), one bowl (of), cupful, glassful, bowlful, spoonful.

noun

  1. one drink (of alcohol).

adjectival noun or quasi-adjective, takes genitive case の, noun used as a suffix

Usually written with kana alone.
  1. full, filled (with), brimming (with), crowded, packed.

adverb, noun used as a suffix

Usually written with kana alone.
  1. fully, to capacity, to the maximum, as much as possible.

adverb

Usually written with kana alone.
  1. a lot, much, many.

noun used as a suffix, adverb

Usually written with kana alone.
  1. all of ..., the entire ....

noun

  1. one (squid, octopus, crab, etc.).
  2. one (boat).

Variations

Pronunciation Kanji Kana Is Common
いっ
一
ぱい
杯
一杯 いっぱい ✔
いっ
1
ぱい
杯
1杯 いっぱい
いっ
一
ぱい
盃
一盃 いっぱい
いっ
一
 
ぱ
 
い
一ぱい いっぱい
いっ
1
 
ぱ
 
い
1ぱい いっぱい

Contained Kanji Breakdown

one, one radical (no.1)
イチ いっ ひと- (1st, N5)
counter for cupfuls, wine glass, glass
ハイ さかずき (Early Jr. High, N3)
tree, wood
き モク こ- (1st, N5)
negative, non-, bad
フ (4th, N4)
cliff, (厂 variant)
divining, fortune-telling, divination or katakana to radical (no. 25)
ボク うらな.う うらない (Kentei Pre-1)